发明名称 |
LED LIGHT SOURCE |
摘要 |
The invention relates to a LED light source comprising: input terminals (K1, K2) for connection to a mains voltage supply source, a rectifier (RB) coupled to the input terminals for rectifying the mains supply voltage supplied by the mains supply voltage source and comprising rectifier output terminals, a DC-DC converter (CONV) for generating a DC current out of the rectified mains supply voltage, comprising converter input terminals connected to the rectifier output terminals and comprising a first converter output terminal (A) and a second converter output terminal (B), —a LED load (LL) with an anode coupled to the first converter output terminal via a current control element (D5) for blocking a current flowing from the anode of the LED load to the first converter output terminal, and with a cathode coupled to the second converter output terminal via a first controllable switch (M1) having a control electrode coupled to first control circuitry for rendering the controllable switch non-conductive in case the LED light source is in standby mode. |
申请公布号 |
US2015069925(A1) |
申请公布日期 |
2015.03.12 |
申请号 |
US201314384047 |
申请日期 |
2013.02.22 |
申请人 |
KONINKLIJKE PHILIPS N.V. |
发明人 |
Van Der Veen Geert Willem;Cornelissen Wilhelmus Josephus |
分类号 |
H05B33/08 |
主分类号 |
H05B33/08 |
代理机构 |
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代理人 |
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主权项 |
1. A LED light source comprising:
input terminals for connection to a mains voltage supply source, a rectifier coupled to the input terminals for rectifying the mains supply voltage supplied by the mains supply voltage source and comprising rectifier output terminals, a DC-DC converter for generating a DC current out of the rectified mains supply voltage, comprising converter input terminals connected to the rectifier output terminals and comprising a first converter output terminal (A) and a second converter output terminal (B), a LED load with an anode coupled to the first converter output terminal via a current control element for blocking a current flowing from the anode of the LED load to the first converter output terminal, and with a cathode coupled to the second converter output terminal via a first controllable switch having a control electrode coupled to first control circuitry for rendering the controllable switch non-conductive in case the LED light source is in standby mode, wherein the first control circuitry comprises a voltage divider comprising a series arrangement of a first resistor and a second resistor connecting the first converter output terminal to the second converter output terminal and a control electrode of the controllable switch is coupled to a terminal between the first resistor and the second resistor. |
地址 |
EINDHOVEN NL |